Winifred Cardew, slot numbers editor
Slot Numbers Editor
Our editor

Winifred Cardew

Winifred Cardew spent seven years as a data journalist covering consumer money, where a headline number had to survive a reader with a calculator. She now applies the same test to slots, turning RTP, hit frequency and stake limits into arithmetic that anyone can rebuild.

Session mathsRTP and hit ratesWorked examples
The data journalist's view

Putting the Caveat Before the Claim

In consumer-finance reporting a percentage without a base is a trap. A savings rate means little until you know the balance, the term and the fee. Winifred brought that habit to gambling pages. An RTP is quoted together with what it costs per £100, a hit frequency with what it does not tell you, and a maximum win with the stake that turns it into real money. It is also why a feature's cost comes before its description: a reader deciding where to spend twenty pounds needs the price first and the story second.

Her earlier work meant explaining products to people who were about to commit a month's budget to them. It taught her that readers forgive dry text but not surprises, so she puts the limit, the cap and the exception in the same paragraph as the feature they qualify. Worked examples do the rest: two hundred spins at one stake, a cap at two different stakes, a bonus that grows by five extra spins. She also keeps a newsroom habit of writing down what a figure cannot show. A hit frequency cannot show the size of a win, an RTP cannot show the length of a bad evening, and a maximum win cannot show how rarely it is reached.

Today she covers RTP and volatility, hit rates, bonus structures, stake limits and the rules that change a game from one market to another. She does not judge whether a slot is exciting. She makes sure the reader knows what it costs, what it can return and what the published numbers leave unsaid.

A figure without its base is only a rumour, so every number on a page is given together with the amount it applies to.

Working method

From Source Figure to Published Page

Each page passes through the same four stages, in this order, before it goes to the reviewer.

1

Find the primary figure

Every number is traced to the provider's page or to the game's own rules and paytable screens. If it is not there, the page says it is unpublished instead of estimating it.

2

Rebuild the arithmetic

Costs per £100, spins per balance and caps at real stakes are recalculated from scratch in a clean sheet, not copied from the draft's own sums.

3

Check it on screen

The claim is checked in the official demo, including awkward cases such as a feature that ends a spin early or a multiplier that only applies inside a win.

4

Write the caveat first

Limits, exceptions and market rules go into the paragraph before the reward they qualify, not into a footnote nobody reaches.

Coverage

What She Covers

RTP and hit rate

what the published figures measure, what they leave out and how to turn them into a cost

Volatility and session maths

spins per balance, dry runs and why an average says little about one evening

Stake limits and market rules

caps, minimum spin times and features that change from one country to another

Bonus structures

triggers, extensions and multipliers, and how a feature's price hides in its odds

One writer, one sceptic

Every page Winifred writes goes to Anselm Podmore, who reads it as a player with a complaint in mind before it is published.

Meet Anselm